Locking device for operating-handles



M. JACOBSKY.

LOCKING DEVICE FOR OPERATING HANDLES.

APPLICATION FILED MAR. 23, 1921. 1,398,232. Patented No 29, 1921..

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LOCKING DEVICE FOR OPERATING-HANDLES.

Specification of Letters Patent.

Applicatlon'flled March as, 1921. Serial no. 454,694.

To all whom it may concern:

Be it known'that I, MAXIM JAooBsKY, a citizen of Ukraine, residing atNew York, county of New York, and State of New York, have inventedcertain new and useful Improvements in Locking'Devices foroperating-Handlea'of which the following is a specification.

This invention relates to improvements in devices for preventingaccidents particu larly accidents caused by an attempt made by anunauthorized person to run an electrically operated elevator during theabsence of the attendant..

More particularly, my invention relates to a lock for locking thecontroller handle of an electrically operated lift or elevator.

It is the object of the invention tofprovide a lock which allows'theoperation'of an elescribed and claimed; it being understoodthat changesmay be made in the precise embodiment of the invention herein disclosedwithin the scope of What is claimed without departing from the spirit ofthe invention.

lever of an elevator controller equipped with.

The invention is illustrated in the accompanying drawing, in which-Figure 1 is a side-view of the handle and a lock constructed accordingto the present invention. Fig. 2 is a front view thereof, looking in thedirection of the arrow 2, Fig. 1.

Fig. 3 a longitudinal section through the controller handle along line33 of Fig. 2,

Fig. 4 is a longitudinal section through an inner sleeve.

Fig. 5 illustrates in side elevation, partly in section the applicationof my lockingdevice to lock the lever of an electric switch box, and EFig. 6' is a top plan view thereof partly in section.

The handle of a controller lever 11 for the box 12 of an electricallyoperated elevator comprises an outer sleeve 13 having the usual form.The lever 11 is pivoted as at '15, near its lower end to a stationarypart 12' of the box 12, while its outer face, near the upper endthereof, is engaged by a nut 16 which is secured to the outer end of abolt 17 extending into a sleeve 18 within the handle 10.

his sleeve has an inner chamber 19 closed at one end'by a head 20, whileits opposite end is closed by the end of a sleeve 21 provided with innerscrew thread adapted to be engaged by the outer screw threaded part 22of the inner end of bolt 17 Within the ,chamber 19, a spiral spring 22is wound around the bolt 17 and rests with one end against the head 20and with the other against the end of stationary sleeve 21.

The sleeve 21 has longitudinal grooves in its upper and lower walls inwhich the shank of a pin 23 passed through sleeve 18 travels, which pinhas heads on its ends resting against the upper and lower outer faces ofthe sleeve 18 so that the sleeve 18 can execute a limited slidingmovement on sleeve 21.

In the outer end of the sleeve 21, a spindle 24 is working provided witha key hole '14 in its outer headed end and which is rotatably connectedby means of a pin 25 to the sleeve 21. The lower end of the pin issuitably guided in the upper Wall of said sleeve. The spindle 24 isthereby rotatably held in said sleeve and forked at one end, it is alsoprovided with three sockets 26, 27, 28 or bearings in its inner wall forthe reception of balls which are placed into these sockets throughsuitable openings in the upper wall of the spindle.

WVithin socket 26 one wall 26 and within each of sockets 27, and 28 twoballs 27 and 28' are arranged insuperposition. The opposite wall of thesleeve 21 has also threev sockets 29, 30 and 31 in which springs 32 arelocated upon which studs 33, 34: and 35 Patented Nov. 29, 1921.

are resting. The number of balls and studs must correspond to the numberof recesses and depressions in the edge of a key 36 adaptedto beintroduced through key-hole 14.

The sleeve 13 has a reduced part 37 which rests between the forks 38 atthe upper end of the stationary part 12' which are of a' .length toprevent the operation of the lever by the handle when the same is in itsposition of rest shown in Fig. 1,'but which allow the passage of bolt 17when the handle is in its restricted position.

The device or lock operates as followsi Assumed the lock is inits'locked position shown in Fig. 1, in which the reduced part 37 of thehandle will rest'between the forks 38 of the stationary part 12, and itis desired to unlock the same. The elevator operator possessing the key36 will place the same into the key-hole 14 and turn the spindle 24' sothat itsforked end allows the entrance of pin 23 between the prongs ofthe fork when the handle is drawn toward the right against the action ofspring 22 so that its reduced end is drawn out from between the leftwith its reduced end 37 between the prongs of the fork 38, whereafterthe key can be withdrawn from the key-hole 14 as the balls will nowdepress the spring controlled studs in the sockets of the sleeve 21 andallow a withdrawal of the key.

Figs. 5 and 6 illustrate the application of -my invention to a switchbox 39 which is provided vwiththe usual slot 40 in its upper face. Inits interior the box is provided with the customary, pairwise arrangedclip contacts 41 and 42. To the lower of these contacts, 42, a forkedswitch lever 43 ispivotally secured so that it can be operated by meansof the handle 44 secured to a head 47 on lever 43 for closing-the switchby engagement of lever 43 with contact 41. This handle has a reducedpart 45, similar to the reduced part 37, and the slot 40 is reduced toform a narrow part 46 and shoulders 46',

' adapted to be normally engaged by the part 45. Pole screws 47 and 48are provided in the well known manner near the contact 41 and 42. Thehandle 4 is'constructed in its interior exactly as handle 13, and itsspindle 50 is adapted to be operated by a key 49 in the manner abovedescribed with respect to key 36 and spindle 24. 4 The operation ofthedevice orlock applied to the handle 44 is exactly the same as theoperation of the handle 13 and co-acting parts described above. l/Vhat Iclaim as new and desire to secure by Letters Patent of the UnitedStates, is-

1. A look of the character described comprising a stationary fork, acontroller lever,

a hollow handle having a reduced end, a

bolt passed into said handle and secured to said lever, a sleeve withinsaid handle connected therewith, means for, normally holding saidhandleon said bolt in its forward position with its reduced end between theprongs of said fork, means for locking hollow handle having a reducedend, a sleeve in said handle having a head, a fork between the prongs ofwhich said reduced end normally rests, a second slotted sleeve havingascrew threaded head, a controller lever, a bolt'secured to said leverhaving a threaded end adapted to engage the thread of said head, aspring in said first named sleeve, a pin in said first named sleeveadapted to travel in the slot of said'second sleeve and a third sleeveor spindle in said-second sleeve having a forked inner end for thereception of said pin under the action of said spring while it iscompressed during the withdrawal of said reduced end from its engagementbetween the prongs of said fork for allowing an operation of thecontroller lever by said bolt adapted to clear the upper ends of saidfork and by said handle, and means for locking and unlocking the partsin their respective positions.

3. In a lock of the character described, a

bolt having a screw threaded end, a con- .troller lever to which theopposite end of said bolt is secured, a hollow handle on said bolthaving a reduced part, a fork on the controller for the reception of thereduced end of said handle when the handle is locked in its inoperativeposition with its reduced end between the prongs of said fork, a meansfor locking said handle in this position and a means for allowing awithdrawal of the handle on said bolt to disengage its reduced end frombetween the prongs of said fork for allowing an operationof saidcontroller lever by the bolt clearing the upper ends of the prongs ofsaid fork, means for locking the parts in their operative andinoperative positions, and means for allowing a withdrawal of the keyoperating the lock when said parts are in their inoperative positionwith the reduced end of said handle between the prongs of said fork toprevent the operation of the controller lever by an unauthorized person.

In testimony whereof I have aflixed my signature.

MAXIM J ACOBSKY.

